THE AGGREGATE PRODUCTION PROCESS
Gravel extraction first began at
our Brock Road site in the early 1960’s.
Initially, removing the gravel from the ground was a fairly
straightforward process and was accomplished using bulldozers and
Over the years as we continued
to excavate further into the ground, extraction became more difficult.
Eventually, as we approached the water table, ground water became an
obstacle as a man-made lake began to form. In order to continue to
access the rich gravel deposits that existed on the property, it was
necessary to use more advanced extraction techniques.
Pictured here is a German
manufactured KS-1000 Drag-Scraper. This machine allows us to extract
material from the lakebed to a depth of 65 feet.
At this point, the extracted
material consists of a combination of sand, rounded rocks and boulders.
To transform this material into saleable aggregate products, a process
of crushing and screening is required.
The extracted material is fed
into the crushing plant through a series of conveyers.
Depending on the set-up, the
crushing plant can produce material that is ready to be sold (such as
Granular A) or material that will be processed further before it is
ready for sale.
In this picture, the output of
the crushing plant (a mixture of sand and crushed stone) is stockpiled
and than transported to the washing plant for further processing.
At the washing plant the crushed
material is washed to reduce the dirt content of the aggregate.
As the material is washed, it travels through a series of screens
in order to separate the sand and stone components.
The sand is stockpiled and must
be allowed to dry before it is ready to be sold
The stone component is sorted
into various sizes (1/4”, 3/8”, and 3/4”), and the stone products
are stockpiled to await shipment to the customer.